sctp: allow users to set netns ecn flag with sysctl

sysctl net.sctp.ecn_enable is added in this patch. It will allow
users to change the default sctp ecn flag, net.sctp.ecn_enable.

This feature was also required on this thread:

  http://lkml.iu.edu/hypermail/linux/kernel/0812.1/01858.html

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
index 1250751bca1bc2283307aaf668a788013d7149b4..238cf1737576ae2c9358cf94f0be5ccb23ace73a 100644 (file)
--- a/net/sctp/sysctl.c
+++ b/net/sctp/sysctl.c
@@ -277,6 +277,13 @@ static struct ctl_table sctp_net_table[] = {
                .mode           = 0644,
                .proc_handler   = proc_dointvec,
        },
+       {
+               .procname       = "ecn_enable",
+               .data           = &init_net.sctp.ecn_enable,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec,
+       },
        {
                .procname       = "addr_scope_policy",
                .data           = &init_net.sctp.scope_policy,